Bellco Liquid Structural Polyurethane Foam

The newest thing to hit the high-end Japanese tuning houses is
polyurethane foam to strengthen Skylines, WRXs, Type-Rs, MR2s, Roadsters, etc. There are
many webpages and installation reports on this product that document its properties.

This product made the most dramatic increase in chassis rigidity
yet. I also have the Moss front subframe brace, stock rear subframe brace, FM front strut
tower brace, Okuyama rear strut tower brace, Team Flatspot rear longitudinal braces and
Wiz underbody frame rail braces. The only way to exceed this amount of rigidity is to
intall a full roll cage. Not even the Hard Dog roll bars can provide this much
strenghtening.

Installation takes about two hours and is non-reversable. The
carpeting needs to be folded back and 1 or 2 holes drilled through the floor into the
center tunnels. There are thin aluminum patches that are glued on from the factory that
are the drilling points. The holes in the undersides of the center tunnels are taped up to
prevent the liquid from escaping. Next, the resin is mixed with the hardener and poured
into the holes. Foaming takes about 5 minutes, after which the carpeting can be put back
into place. Installation complete.

Difficult to remove without leaving damage

Update - It has been two years now since I
installed the foam in my 93LE and all is well. There has been no sign of any
rusting, nor any degradation of the foam. The car is a solid feeling as the
first day after installing the foam.